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c09a2f5387
Change-Id: Ic24a54ab520053e49efcba02bd9fa5b8ce69b20a Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org> Reviewed-on: https://review.coreboot.org/c/flashrom/+/89956 Reviewed-by: Antonio Vázquez Blanco <antoniovazquezblanco@gmail.com> Reviewed-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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* SPDX-FileCopyrightText: 2008 Claus Gindhart <claus.gindhart@kontron.com>
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* SPDX-FileCopyrightText: 2009 Sean Nelson <audiohacked@gmail.com>
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* SPDX-FileCopyrightText: 2013 Stefan Tauner
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*/
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/*
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* All ST M50 chips are locked on startup. Most of them have a uniform 64 kB block layout, but some have
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* a non-uniform block/sector segmentation which has to be handled with more care. Some of the non-uniform
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* chips support erasing of the 4 kB sectors with another command.
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*/
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#include "flash.h"
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#include "parallel.h"
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#include "chipdrivers.h"
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static int stm50_erase_sector(struct flashctx *flash, unsigned int addr)
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{
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chipaddr bios = flash->virtual_memory + addr;
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// clear status register
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chip_writeb(flash, 0x50, bios);
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// now start it
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chip_writeb(flash, 0x32, bios);
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chip_writeb(flash, 0xd0, bios);
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programmer_delay(flash, 10);
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uint8_t status = wait_82802ab(flash);
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print_status_82802ab(status);
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return status == 0x80;
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}
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/* Some ST M50* chips do support erasing of sectors. This function will derive the erase function to use from
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* the length of the of the block. For calls that apparently do not address a sector (but a block) we just call
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* the block erase function instead. FIXME: This duplicates the behavior of the remaining erasers for blocks and
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* might be fixed when flashrom supports multiple functions per eraser or erasers that do erase parts of the
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* chip only. */
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int erase_sector_stm50(struct flashctx *flash, unsigned int addr, unsigned int len)
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{
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if (len == 4096)
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return stm50_erase_sector(flash, addr);
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else
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return erase_block_82802ab(flash, addr, len);
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}
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